title: Multimode resonant Auger scattering from the ethene molecule.
abstract: Resonant Auger spectra of ethene molecule have been measured with vibrational resolution at several excitation energies in the region of the C1s(-1)1b(2g)(π*) resonance. The main features observed in the experiment have been assigned and are accurately interpreted on the basis of ab initio multimode calculations. Theory explains the extended vibrational distribution of the resonant Auger spectra and its evolution as a function of the excitation energy by multimode excitation during the scattering process. As a result, the resonant Auger spectra display two qualitatively different spectral features following the Raman and non-Raman dispersion laws, respectively. Calculations show that two observed thresholds of formation of non-Raman spectral bands are related to the "double-edge" structure of the X-ray absorption spectrum.
authors.affiliation: Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden.
authors.forename: Ji-Cai
authors.initials: JC
authors.lastname: Liu
authors.forename: Christophe
authors.initials: C
authors.lastname: Nicolas
authors.forename: Yu-Ping
authors.initials: YP
authors.lastname: Sun
authors.forename: Roberto
authors.initials: R
authors.lastname: Flammini
authors.forename: Patrick
authors.initials: P
authors.lastname: O'Keeffe
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Avaldi
authors.forename: Paul
authors.initials: P
authors.lastname: Morin
authors.forename: Victor
authors.initials: V
authors.lastname: Kimberg
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Kosugi
authors.forename: Faris
authors.initials: F
authors.lastname: Gel'mukhanov
authors.forename: Catalin
authors.initials: C
authors.lastname: Miron
mesh_terms: D005030:Ethylenes / Q000737:chemistry*; D013816:Thermodynamics; D056928:X-Ray Absorption Spectroscopy
chemical_list: D005030:Ethylenes; C036216:ethylene